How do I change the wick in a Kerosun 3870 kerosene heater?

I have a wall heater, the pilot light was out so I re-lit it a couple days ago and it went on.. about 4 hours later I noticed it was out again... same thing off and on for three days... this time I lit the pilot and turned the heater on it immeditly made a click sond and went out completely... it...

I am an ametuer repair person with a simple possibly stupid question, I cannot open the Kenmore Elite dryer to change the heater fuse :confused: How does one open the back of the unit to view the heater fuse?

How do I take off the door to get to the lint trap screws?

Gatsby spa is out of business, maybe for this reason. This is the wiring design I need to change it. By this diagram the heater is on whenever the thermostat says it is cold and 24 volts are supplied to the relays. Note the pump is not on. This design relies on the High limit switch to kill...